Coach tends to wander

1ST of all there are many reasons why a coach would wonder or drive loosely. Start with tire pressure, then load distribution, then if they are OK then look at stabilizer bushings. They are sometimes worn out and can solve the problem at little cost. Then shock absorbers, followed by control arms, and then steering box and rack and pinion, tie rod ends and or tightness of all steering components. Tires should be rated for the load you carry and no more than 7 years old. The roads do cause weight distribution to be shifting if you have the air bags to set pressure, most times the low point of the road is ditch side which requires that side to be lower and tip the tall RV which shifts the load and causes steering problems. So up the air bag pressure about 10 LBS more on the ditch side which in USA is right side. Of course if you are texting and talking on a non blue tooth cell phone, stop doing that as you need to be concentrating on the road. Make sure your load is not on the rear overhang of the rear axle, as that will make the rear,(tail), wag the dog (front).